1 tart apple, such as Granny Smith, cored and chopped
1/4 cup currants, or raisins
Bring broth and water to a boil in a large shallow pan. Add the chicken and reduce heat to low. Simmer, partially covered, until the chicken is no longer pink inside, 10 to 12 minutes. Transfer chicken to a shallow dish and pour the cooking liquid over the top. Refrigerate until chilled, at least 1 hour or overnight. Remove the chicken from the cooking liquid and dice.
Stir mayonnaise, yogurt, chutney and curry powder in a medium bowl until well blended. Add the diced chicken, apple and currants (or raisins) and toss until thoroughly coated.